Leather-staking machine.



A. 0. LAYMAN. LEATHER STAKING MACHINE.

APPLICATION FILED MAR.11, 191].

Patented 0ct.29,1912.

3 SHEETS-SHEET 1 A. C. LAYMAN.

LEATHER STAKING MACHINE.

APPLICATION FILED MAR.11,1911.

Patented 0@1;.29,1912.

3 SHEBTS-SHEET 2 A. 0. LAYMAN.

LEATHER STAKING MACHINE.

APPLICATION FILED MAR. 11, 1911.

Patented Oct. 29, 1912..

3 SHEETS-SHEET 3.

VI/will mwm UNITED STATES PATENT OFFICE;

ALFRED C. LAYMAN, 0F WILMINGTON, DELAWARE.

LEATl IER-STAKING MAcniNnf Specification of Letters Patent.

Patented Oct. 239, 1912 Application filed March 11, 1911. Serial No. 613,692.

I tion in an-eilicient and satisfactory manner.

The important features of my invention relate to the mounting of the staking arms in connection with the cross-head whereby they are properly cushioned and opened by the cams uring the operation of thefly wheel; and a further feature of my invention is the provision ofmeans for ready adjustment of the staking elements with respect to each other. v

These and other features of myinventlon are more fully described hereinafter, reference being had to the accompanying drawings in which:

Figure 1, is a side elevation of a staking machine embodying my invention; F i 2, is a sectional elevation on the line aa,' ig. 3; Fig. 3, is an end elevation; Fig.4, is a sectional elevation on the line b?), Fig. 1;

Fig. 5, is a sectional elevation on the line c-c, Fig. 1-: Fig. 6, is a perspective view illustrating a detail of my invention: Fig. 7,

is a sectional view on a larger scale illustrating a. detail of my invention. and Fig. 8, 1s a view on a similar scale of the cams employed in my improved machine.

Staking machines in general comprise suitable frames having guideways in which a cross-head is adapted to slide; said cross head serving to reciprocate a pair of arms or levers whichmay be pivotally mounted or hung in a suitable manner; the crosshead being operated bya suitable connection from a fly wheel or crank on a shaft driven from a suitable source of. power. The said connection between the .drivi'n shaft and the cross-head is usuallyprovided "with cams so shaped. and hearing such relation to the arms or levers, the latter carrying suitable means for engagement with" the cai'nsathat the positioning of the driving connection andthe earns controlled thereby will control the position of said arms or levers and the engagement and d sengage- .of said cam.

nient of means carried by said arms or levers with the leather in softened. 'In the drawings herewith, in which myprocess of being improved staking machine is clearly illustrated, 1 represents the upper arm or lever, and 2 the lower arm or lever; the upper lever being pivoted at 3 to, fixed side mernhers or brackets 4 carried by a cross-head 5,

and the lower lever being pivoted at 6 to pendulum links 7 carried by said cross-head and pivotally hung therefrom at 8.

10 represents the main driving shaft, which may carry a fly wheel 11 and suitable fast and loose pulleys 12; said fly wheelhaving a crank arm 13 or other'connection attached at, 14 to a connecting rod 15 which 111 turn is pivotally connected at 16 to the cross-head 5. At or adjacent its engage-' ment with said cross-head, the connecting rod is provided with cams 1'? and 18 on opposite sides of its pivotal point; said cams having high and low faces 19 and 20 oppositely arranged on opposite sides of said pivot.

Independent of the arms or levers 1- and 2, but rocking on the same pivots, are. links 21-having cross bars 22 upon which bear adjusting screws 23 secured to said arms or levers 1 and 2, by lock nuts 24. These links carry rollers 25 in engagement Wit-h the cams 17 and 18, so that movement imparted by said cams in assumingtheir varying positions under the influence of the connecting rod 15 will bedirectly transmittedto the arms 1 and 2. It is,.of course, necessary that the rollers controlling the position of the arms be maintained in contact with said cams, and for this purpose the following means may be provided: As shown in Fig. 6, the pin forming the pivotal connection for the connecting rod and-the cross-head'carrise at its outer ends rods'30 disposed substantially vertical, which rods pass through a plate 31 connected to the upper arm 1. v

inc

Above this plate are springs 33 maintained undersuitable tension by means or washers 34 and nuts 35, and these springs tend 'to hold the endof the upper arm 1 so as to cause the oller carried by the link 21 to engage the pper'cam of the connecting rod.

Any movement of said cam. therefore will be imparted to this roller, and the arm will be moved K111311111, depending upon the path Iojkeep the-lower arm with its reai' end raised in engagement with the cam, I may provide a fiat spring 36 carried by the crosshead. As thearms are carried back and forth, the outer end of the same carrying the usual blades 37 and 38 and roller 39 will be separated, permitting the skin to be shifted so that when the arms close again with the roller holding the skin against the blades, a freshportion of the skin may be operated upon.

The upper armor lever carries the roller 89, while the lower arm carries the blades 37 and 38 the blade 37 being of fiber and more or less blunt, while the blade,38 is of metal and is relatively s arp, and in.the present instance is mounted in front of the blade 37 or toward the operator. The position of these blades with respect to the roller should be regulated for skins of varying thickness,- and this may be accomplished in the following manner The forward blade 38 may be fixed with respect to the lever or arm 2 so that the lever itself must be moved in order to change its position, and this movement of the arm or lever may be accomplished in the following manner: As before noted, the lever 2 is pivoted to pendulum links 7 carried by the cross-head,iwhich links are in turn pivotally connected at 8 to fixed ears or lugs 40 carried by said cross-head, while the links carrying said arm or lever are further trunnioned to a nut 11 adapted to a threaded sleeve 42 carried by a bracket 43 depending from the under side of the cross-head; said sleevesliding on a squared shaft 44: as the cross-head moves back and forth. The

sleeve is fixed in position by reason ofan annular shoulder 45 thereon abutting the bracket carryingv the same, with suitable locking means on the other side of said bracket, which locking means may be suitable set screws or other equivalent devices such as the 'nuts 46shown. By turning the threaded sleeve withrespect to the nut carried by the links 7 to which the lower arm is pivoted, the longitudinal position of said arm may be adjusted. To effect turning of this sleeve, the following means may be employed: The outer end of said squared shaft on which the threaded sleeve slides carries a sprocket wheel 50 which may be driven by a chain, 51 from another sprocket wheel 52 carried by a shaft, 53 suitablyjournaled in the lower part of the fIELIIl6' of the ma-. chine, which shaft 53'maybe operated by a suitable wheel 54 having spokes 55; the movement of said wheel being usually ofi fected by the operator kickin'g'the same; thespokes extending beyond the .rim of the wheel and in relatively easy access of the operator. 1 It {will be seen, therefore, that upon rotating the squaredshaft, thus turning the'thi eaded sleey'e, the nut 41 may be 7 moved'back'and forth to the desired extent to regulate the position of the forward blade without materially affecting the operation of said arm by its cam 18 due to the shifting of the position of the roller carried by the links cotiperating with said arm with relation to said cam. The rear blade 37 carried by the lower arm or lever is mounted on screw stems 56 carried by the forward end of said arm, and said screw stems may be provided with looking nuts 57 or equivalent means so that when the blade 37 is adjusted, it may be locked in its adjusted position. Similar means may be provided for proper adjustment of the' brackets carrying the roller 39 of the upper arm or lever in case it be desired to employ-a larger or smaller roller'carried by said arm 1.

At theforward end of the machine I provide supporting means in the shape of a pair of tables or shelves, which shelves or tables are removable if desired. These shelves or tables are indicated at 60 and are carried by brackets 61 secured to the side frames of the machine; said brackets having suitable means whereby the shelves may be removably mounted therein and secured by nuts (56. The outer ends ofthese shelves or tables are preferably connected by a cross piece 67, having its upper central portion cut away for the reception of a substantially cylindrical memberiorroller 68, overwhich the skins are passed by the operator. This member is really in the nature of a breast roll against which. the operator leans to hdld'the skin. Constant use in the manner indicated wears the same irregularly, since it is usually and preferably made of rubber, and to provide for adjustment of this member and to effect as nearly as possible an 'I u u even wear of the same, it 18 provided with shaft or spindle ends 69 mounted in hinged bearings 70, which bearings may be closed by lock nuts 71 having suitable operating means which serve to frictionally hold said shaft or spindle ends in their journals or bearings. Should wear occur, the bearings may be opened and the member shifted slightly in said bearings so as to bring a fresh face into position for engagement by the operator.

I claim:

1. In a leather staking machine. the combination of a pivotally mounted arm, a swinging support for said arm, a threaded sleeve suitably supported for rotative move- 1nent,means for moving said sleeve, and a nut on said sleeve operatively connected-with said swinging support whereby movement of said threaded sleeve will effect longitudinal movement of the'arm.

2. In a leather staking machine, the combination of an arm carrying staking elements, a swinging support in which said arm is pivotally mounted, a threaded sleeve, a rotatable support for the same, a nut on said sleeve operatively connected to said swinging. support, and means for rotating said threaded sleeve to move said nut and client longitudinal movement of the arm.

- 3.. in a leather staking machine, the comhination. of a pivotally mounted arm, a swinging support for said arm, a threaded sleeve, a shaft carrying said sleeve, means for moving said shaft, and a nut ens-aid sleeve in operative engagement with said swinging support whereby movei'nent of said thread ed sleeve will effect longitudinal movement of the arm.

4. in a leather staking machine, the combination of an arm carrying staking blades, a swinging support in'which said arm is pivotally mounted, a threaded sleeve, a rotatable shat't carrying the some, a nut on said sleeve pivotally connected to said swinging: support, and means for rotating said shaft Wherel'iy movement is imparted to said threaded sleeve to effect longitudinal movement of the arm.

In a leather staking machine, the combination of a frame, a cross-head reciprocahle therein, means for moving said cross head, a swinging support carried by said cross-head, an arm pivotally hung onsaid swinging support, a threaded sleeve suitably supported means for rotating said sleeve, and a out on said sleeve in operative engement with said swinging support where by movement of said threaded sleeve Will eti'ect longitudinal movement of the arm.

6. In a leather staking machine, the combination of a pivotally mounted arm or lever, a swinging support for said arm, a squared shaft, a threaded sleeve thereon, a nut on said sleeve, and a connection between laid out and the link supporting the arm whereby movement of said squared shaft may efiect longitudinal movement of the arm. I i

7 In a leather staking machine, the combination of a cross-head,'l1 nks carried there by, an arm pivotally hung in said links and carrying a pair of blades, a squaredshaft, a

threaded sleeve thereon, a nut trunnioned to said links and threaded on the sleeve where by movementofsaidsquared shaft may effect longitudinal movement of thearm and the blades carried thereb and means lorturning said squared shaft, v y

8. In a leather staking machine, thecom bination of a frame,a cross-head arranged; to slide in said framefme'ans for moving;

said cross-head, 'pivot pins'oarried by said cross-head, a pair ofarms journaledon said pins and movable with the cross-head, cams pit fatally connected to said; crossheadi links ,journaled on the "pins carr ed by the cross, CdflllGCl, byI:sa1d-".'lmlrs,:; means head, roller fora-hair"- ning said roller in engagement with the some Wherebyth arms may be he change n. PQsitio'ri-of said cams during movements of caused to open and close by the cross head, a pair of blades carried by one of said arms at the forward end of the 'ame', a swinging support between said arm and the cross-head, a threaded sleeve suitably supported for rotative movement,

means for moving said sleeve, a nut on" said.

sleeve operatively connected With said swingin; supportwhereby movement of said thrt-iaded sleeve will elie'ct longitudinal movement of said arm, and a roller carried bv the other arm for coaetion with said blade. I

9. la a. leather staking machine, the combination of a frame, a cross-head arranged to slide in said frame, means for moving said'cross-head, pivot pins carried bysaid ciosshead a pair of staking arms, one of said arms being journaled on one of said pins and both of said armsbei-ng movable by the cross-head, cams pivotally connected to said crosshead, a'swing'ing support, for the other staking arm, a plurality of links, one of said links being journaled on one of the pins carried by the cross-head and the otherlink being journaled on the swinging support, rollers carried by said links, means for maintaining said rollers in. engagement With the cams whereby the arms may be caused to open and close by the change in position of said cams during movements of the cross-head, a pair of blades carried by one of said arms at the forward end of the same, a threaded sleeve suitably supported for rotative movement, means for moving said sleeve, a nut on said sleeve operatively connected with said swinging support whereby movement of said threaded sleeve. will eli'ect longitudinal movement of the arm carried by the swinging support, and a roller carried by the other arm for ooaction with said blades. I

10. In a leather staking machine, the com bination of a. frame, a cross-head arranged to slide in said frame, means for moving said cross-head, pivot pins carriedby said cross-head, a pair of arms,' one or" said arms beingljournaled'on one of said pins and movable with the cross-head, a swinging support *journal'ed on the other pin and icarryingtheother arm, cams pivotally connectedto. said cross-head, links journaled onfthe same axis as the arms, rollers carried said links, and means for maintaining whereby the arms may be caused to open "saidfi rollers in engagement ,ivith the cams 12o aliidczlose t hqchange in position of said came during movements of the cross -heacl.

11'; In a; leatherlfst-aking machine, the combination of a; ama s; osahead arranged to slidev in said frame, i said cross heodQPivot pinsear-riedb}; said "eross head, a pair of arms,one ofil said arms being jonrnaled "on {one of. said ins and movable fvvitli t-liecress hea;'d, cams pivotally "c'oniieotedtofsaid cross'fhead, a plurality oil.

means tor" are-m links, rollers carried by said links, means for maintaining said rollers in engagement with the cams whereby the arms may be caused to open and close by the change in position of said cams during movements of the cross-head, and a swinging support con necting one of said arms with the cross-head whereby the said arm may have movement with and independently of said cross-head, said roller-carrying links being journaled on the same axis as the arms.

12. In a leather staking machine, the combination of a frame, a cross-head arranged to slide in said frame, means for moving said cross-head, pivot pins carried by said cross-head, a pair of staking arms, one of said arms being journaled on one of said pins, and both of said armsbeing movable by the oross-head, a sivinging slipport ior the other'staking arm, a plurality of links, .one ofsaid links being journaled on one In testimony whereof, I have signed my 2 name to this specification, in the presence of two' subscribing witnesses.

' ALFRED G. LAYMAN. Witnesses:

MURRAY C. BOYER,

W A. BARR.

Copies of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents.

Washington, D. 0. 

